Furnace



Dec. 19, 1944. FORSBERG 2,365,183

FURNACE Filed March 3, 1942 3 Sheets-Sheet Fw yz Inventor jayarflforser M Bil Dec. 19, 1944.

E. E. FORSBE-RG 2,365,183

FURNACE Filed March 3, 1942 s Sheets-Sheet 2 Inventor fajakrmrs'er M 9 By 2mm W lime I FURNACE Filed-March 3, 1942 3 Sheets-Sheet 3 94 0 o LE1 EEI BE! 5 GQHQQQ O O O 0' 0'0 14 a y A? v 8 11 1 ueulor zgwrziamm Patented Dec. 19, 1944 FURNACE- Edgar E. Fors berg, Chicago, Ill. assignor of twenty-five per cent to Stanley Braunis,

Chicago, Ill.-

Application March 3, 1942, Serial No, 433,218 7 Claims. (01. 266-4) The invention relates tomeans for'use in conjunction with or to be incorporated in a furnace for supporting and water-cooling portions of metal'objects while heating other portions thereof, whereby a portion of the metal object is kept at a controlled reduced temperature while an other portion thereof is ,being subjected to the full furnace temperature, and an important object of the invention is to provide an efiicient the appended drawings, wherein for purposes of illustration a preferred embodiment of the invention is shown.

. .In the drawings-- Figure 1 is a generallongitudinal vertical sectional view of a preferred embodiment of the invention.

Figure 2 is a horizontal sectional view taken through Figure 1 along the line 2--2 and looking v downwardly in the direction of the'arrows.

Figure 3 is a horizontal sectional view taken through .l igure 1 approximately on the line 3-3 and looking downwardly in the direction of the arrows.

Figure 4 is a transverse vertical sectional view taken through Figure 1 along the line 4-4 and looking toward the left in the direction of the arrows.

Figure 5 is a fragmentary view similar to Figure 1, showing a modified form of support for'the forgings and the like. t

Figure 6 is a horizontal sectional view taken through Figure 5 along theline 66 and looking downwardly in the direction of the arrows.

Figure '7 is a fragmentary transverse vertical sectional view taken through Figure 6 along the line 1-1 and looking toward the left. in the direction of the arrows.

Referring in detail to Figures 1 through4 of the drawings, the numeral 5 generally designates the rectangular sheet metal casingwhich has a water inlet conduit fi entering adjacent the bottom of the casing at one corner and through which water flows into the casing and is kept flowing to maintain the desired temperature of the water for in turn controlling the temperature of the portion of the metal object or objects immersed therein. A water jacket I is composed of a laterally projecting horizontal flange 8 and 2. depending vertical flange" 9 on the inner edge of the flange 8, these flanges running around the four sides of the casing at alevel substantially below the upper edge I0 of the casing as illustrated in Figure 1 of the drawings. A wide water outlet or overflow conduit generally designated H is provided to project laterally from the casing opposite the inlet 6 and above the flange 8, this overflow being laterally elongated as indicated in Figure 2 of'the drawings and 'substantially centrally located. With the water properly flowed into the casing the water level I2 is somewhat above the bottom'of the overflow II as indicated in Figure 1 of the drawings, that is,

slightly above the water jacket flange 8. i

The casing Shas the opening l4 extending along one side above the level of the water jacket and a'protective pavement l3 of firebrick or the equivalent is mounted on the flange 8 at the bottom of the opening to theflange 8 and the, water jacket from heat injury due to contact' therewith of the metal objects, portions of which are being heated and cooled simultaneously within the casingi. I

The opening [4 is defined by one side of the brick work dome which is ge'nerally designated l5 and which comprises ,a longitudinal arch l6 whose opposite ends rest on the firebrick walls I! and I1 which in turn, rest on'the corresponding portions of the casing flanges 8. A longitudinal firebrick wall 18 extends between the walls wall of the casing 5 isprovided with a large rectangular inspection opening I9 which is closed by a bolted plate 20. A clean-out opening2l is also provided in the said front wall adjacent the bottom of the casing to drain off accumulations in the casing.

Supported for vertical movement in the space defined by the depending flange 9 of the water. jacket is the adjustablerest or platform 22 which comprises a relatively heavy rectangular metal plate formed at regular intervals with water passing perforations 23, said plate being adapted inits most depressed position to rest upon lugs 24 projecting laterally inwardly from the flange 5|, as indicatedin Figures 1 and 4.

Attached to the bottom of the platform 22 are bearing plates '25 which are riveted in place as,

The lower front indicated by the numeral 26, there being in the illustrative example, two of said bearing plates disposed at longitudinally spaced intervals. The

- bearing plates have sockets 21 formed therein to socket the upper end 28 of the vertically adjustable screws 29 and 29.

Supporting the screws 29 and 29 are the frame 30 which is horizontally disposed at an intermediate height in the casing and consists of spaced longitudinal members 31 and connecting cross members 32 and 32', having lateral enlargements 33 between the numbers 3| as indicated in Figure 3 of the drawings. The cross member 32 has'an opening provided with a key 34 entering a key slot 35 in the side of the screw 23 to keep the screw from rotating in its up and down movement. A bevel gear 36 suitably mounted on the cross member 32 is threaded on the screw 29, and a beveled pinion 38 fixed on a horizontal rotary shaft 39 is in meshwith the bevel gear 36 to turn the bevel gear and the screw 29 with the platform together with the work pieces to raise or lower the screw 29. A similar bevel gear 40 is threaded on a screw 23' and is mounted on the cross member 32' as indicated by the numeral 31, but is unkeyed to the screw 29'. The bevel gear 40 is driven by a bevel pinion 38, like the pinion 38 :fixed to the shaft 39, whereby both screws 29 and 29' are adjusted the same amount by the .ro tation-of the shaft 39. The screw 29' is'slotted as indicated by the numeral 39' to pass the shaft 39.

The shaft 39 is supported inbearings 4i and 4| rising from the extensions 33 on the cross members32 and 32', and the shaft 39 extends outwardly of the adjacent end of the casing as indicated in Figure 1 of the drawings where it is provided with a hand wheel 42 enabling the desired adjustment from outside of the casing.

The shaft 39 passes through a packing gland 43 as it emerges from the end of the casing as indicated in Figure lof the drawings.

With the water lever I 2 established in'the casing 5, the forging or tube of which a portion to be cooled while another portion thereof is subjected to the heat of the furnace, is entered into the furnace by passing it through the opening i4 and rested upon the platform 22, which has previously been adjusted to the required elevation, and the flow of the water through the casing is kept up at proper rate to effect the desired cooling. Objects suchas relatively large diameter tubes 63, see Figures 1 and 2 having a sufficiently wide base to be self-supporting on the platform are placed directly thereon without additional holding or stabilizing means. In order to either enter or remove the work pieces 53 or63, the platform 22 should be raised to the level of the ,protective pavement l3 over which the work pieces are passed in or out of the furnace.

However, where the objects to be'treated in the furnace are of irregular shapes as at 53, or have bases too small to provide adequateself-support for the objects on the platform 22, a supplementary plate 44 (shownin Figures 5, 6 and 7 of the drawings) is mounted on the platform 22 by means of bolts 45 passing vertically through corner portions of the plate 44 and ,through appropriate openings in the platform 22, with-nuts 46 between the ends of the bolts to space the plate '44 upwardly from the platform 22. Heads 4'! on the upper ends and nuts 4l' on the lower ends ofthe bolts 45 hold the plate 44 assembled to the-platform.

, The plate 44 may be of any suitable shape, but

a. preferred shape for use with small forgings and tubes, involves the relatively narrow longitudinal part 48 having the cross heads 49 on its opposite ends. Distributed along the part 48 and along the cross heads are tubular holders 5!) having lateral lugs 5i bolted to the plate 44 as indicated by the numerals 52. The forgings and small tubes or irregular shapes exemplified by the dotted outlines 53 are stood up in the holders 5i! as indicated. The plate 44 has water holes 54 to ensure proper circulation of cooling water through the supplementary plate 44 and between the plate 44 and the platform 22. vIt is obvious that the furnace heat is applied as for instance by gas jets from pipes 50, Figure '1, to the objects above the water line I 2. For heating the furnace may be used either gas heat, electricity or oil as being cheapest or best available in the locality where the furnace is located.

Although there is shown and described herein the preferred embodiment of-the invention, it is to be definitely-understood that-it is not desired to limit the application of the invention thereto, except as may be required by the scope of the subjoined claims.

Having described the invention, what is claimed as new is:

1. A furnace comprising means for water-cooling a portion of an object; while another portion thereof is being heated in the furnace, said means comprising a water containing casing, a protective water jacket extending around the inside of the upper part of said casing, water inlet and outlet means for said casing to maintain water circulation in said water jacket toapproximately the height of the upper part of the water jacket", a heat resistant hood enclosing the upper part of said casing above said water jacket, thelfron't of the hood and the casing being open to permit placing the object into furnace in the space within said water jacket, an object supporting plat-. form within said water jacket, and adjustable support means to position said platform at a desired element below the water level to support the object with the lower portion in the water and its upper portion above the water in the casing.

2. A furnace according to claim 1 wherein said adjustable support means comprises a horizontal frame fixed across said casing below said platform, vertical screws mounted for up and down movement on said frame, said screws having their upper ends connected with said platform, an operating shaft projecting through the wall of said casing for turning from a point exterior of said casing, and gear means operatively connect-i ing said shaft with said screws for simultaneously raising or lowering said screws to change the elevation of said platform.

3. A furnace according to'claim 1 wherein said adjustable support means comprises a horizontal frame fixed across said'casing below said platform, vertical screws mounted for up and down movement on said frame, said screws having their upper ends connected with said platform, an operating shaft projecting through the Wall-of said casing for turning from a point exterior of said casing, gear means operatively connecting said shaft with said screws for simultaneously raising or lowering said screws to change the elevation of said platform, said frame being located below the water jacket, and lugs on sides-of said water jacket to prevent the platform from sub e siding below the water jacket. I

4. A furnace comprising means for water-cools ing a portion of an object while another portion thereof is being heated in the furnace, said means I comprising a water containing casing, a protective water jacket extending around the inside'o-f the upper part of said casing, water inlet and outlet means for said casing to maintain water circulation in said water jacket to approximately the height of the upper part of the water jacket,

a heat resistant hood enclosing the upper part of said casing above said water jacket, the front of the hood and the casing being open to permit placing the object into furnace in the space within said water jacket, an object supporting platform within said water jacket, and adjustable support means to position said platform at a dethereof is being heated in the furnace, said means comprising a water containing casing, a protective water jacket extending around the inside of the upper part of said casing, water inlet and tive water jacket extending around the insideof the upper part of said casing, water inlet and outlet means for said casing to maintain water circulation in said water jacket to approximately the height of the upper part of the water jacket, a heat resistant hood enclosing the upper part of said casing above said water jacket, the front I of the hood and the casing being open to permit placing the object into furnace in the space within said water jacket, an object supporting platform within said water jacket,- and adjustable support means to position said platform at a desired elevation below the water level to support the object with the lower portion in the water andits upper portion above the water in the casing, a supplementary object supporting plate, means mounting said supplementary plate upon said platform in upwardly spaced relation thereto to permit the water to circulate between the platform and the supplementary plate, and object holders secured to and distributed along the upper surface of said supplementary plate, said object holders comprising members providing outlet means for said casing to maintain water circulation in said water jacket to approximately the'height of the upper part of the water jacket, a heat resistant hood enclosing the upper part of said casing above said water jacket, the front of the hood and the casing being open to permit placing the object into furnace in the space within said water jacket, an object supporting platform within said water jacket, and adjustable support means to position said platform at a desired elevation below the water level to support the object with the lower portion in the water and its' upper portion above the water in the casing, a. supplementary object supporting plate, means mounting said supplementary plate upon said platform in upwardly spacedrelation thereto to permit the water to circulate between the platform and the supplementary plate, and object spaced vertical walls between which the objects are supported in vertical position on said supple,- mentary plate.

7. A furnace comprisingmeans for water-cooling a portion of an object while another portion thereof is being heated in the furnace, said means comprising a water containing casing, a protec-' tive water jacket extending around the inside of the upper part of said casing, water inlet and outlet means for said casing to maintain water circulation in said waterjacket to approximately the height of the upper part of thewater jacket, a heat resistant hood enclosing the upper part of said casing above said water jacket, the front of'the hood and the casing being open to permit placing the object into iumace in the space within said water jacket, an object sup-porting 'plat form within said water jacket, and adjustable support means to position said platform at a de-' holders secured to and distributed along the upper comprising a water containing casing, a protecsired elevation below the water level to support .the object with the lower portion in the water and its upper portion above the water in the casing, a supplementary object supporting plate, means mounting said supplementary plate upon said platformin upwardly spaced relation thereto to permit the water to circulate between the platform and the supplementary plate, and object holders secured to and. distributed along the upper surface of said supplementary plate, said object holders comprising vertical cup-like members having lateral lugs secured on the'top of "the supplementary plate. V

' EDGAR. E. FORSBERG. 

